According to Chapter 48 of Sai Satcharitra, what are the qualities that do NOT define a true Sadguru?

Chapter 48 makes it clear that certain abilities do not automatically qualify someone as a Sadguru. The wise do not consider those who merely study the Vedas, know the six Shastras, or explain Vedanta as Sadgurus. Furthermore, as this chapter explains, practices like controlling breath (Pranayama), wearing heated marks (Taptamudra), or pleasing audiences with talks on Brahman are insufficient. The text describes giving mantras from scriptures without the certainty of results and possessing vast but hollow verbal knowledge without self-experience as traits of those who should not be called a Sadguru.